Support

For the GD350A, versions 6.09/6.10 and 3.09/3.1 can be used directly with EtherCAT communication expansion cards without requiring the burning of dedicated communication software.

Control boards running version 6.09 or higher are different from those running 6.08 or lower. Control boards with 6.08 or earlier cannot be flashed with 6.09 or 6.10 software. Similarly, control boards running 6.09 or higher cannot be flashed with software versions 6.08 or earlier.

GD350 supports software programming via RS485 in software versions 6.00 and above.

Use the polling method to trigger the ModbusRTU communication read and write instructions. For read and write instructions, use the rising edge trigger (↑) to avoid continuous reading and writing occupying the channel.

The GD350-19 does not have an expansion card supporting BACnet IP communication. A multi-function expansion card incorporating BACnet IP and other communication protocols is currently under development and is expected to be available in 2026.

Model: IPE300-090G-4

Application condition: Ordinary speed regulation of washing machine. 

Fault phenomenon: After the VFD is powered on, the display screen flashes once and then goes out, repeating the cycle. 

How to solve it?

Reason analysis: 

The static measurement main circuit is intact. Measure that there is no 10V or 24V voltage at the motherboard terminals when powered on. Disassemble and inspect the U-phase circuit of the drive board. There is a voltage regulator tube that has changed color. Check for abnormal IGBT junction capacitance corresponding to phase U. Analysis shows that the short circuit at the IGBT trigger end resulted in the protection of the switch power supply on the drive board. 

Solution:

 Replace with a new driver board and U-phase IGBT. 

Improvement effect: 

The motherboard displays normally and the motor runs normally.

Model: GD270-220-4 

Application conditions: General application of water pump speed regulation. 

Fault phenomenon: There is abnormal noise and smoke during the VFD operation for a period of time, and the front switch trips. 

How to solve it?

 Reason analysis: 

Static measurement shows an open circuit in the inverter bridge section. There is no obvious abnormality in the waveform of the power grid measured by the oscilloscope. Upon disassembling the machine, metal conductive dust was found inside. The dust caused the positive and negative busbars to ignite and discharge under the action of the fan, resulting in a short circuit current during ignition and damage to the inverter module. 

Solution:

 Improve the environment and regularly clean up dust. Install insulation tape between the positive and negative busbars to strengthen insulation.

Improvement effect: 

Stable operation.

Model : IPE300

Application condition: asynchronous motor long cable application. 

Fault phenomenon: Some output reactors have a temperature of 90℃, while the reactors change color. 

How to solve it?

Cause analysis: 

Check the motor cable for approximately 100-400 meters. Check that the carrier frequency of theVFD is set to 3-8kHz. Check the nameplate of the reactor to see if it is suitable for a carrier frequency of 2kHz. 

Solution: 

Optimize the carrier frequency of the VFD and reduce it to 2kHz for carriers with severe heating. 

Improvement effect: 

Reduce the temperature of the output reactor from 90℃ to 60 ℃

VFD Model: GD350A-004G-4

Application: Sewage mixer synchronous motor speed regulation. 

Fault phenomenon: The motor shakes and makes abnormal sounds after operation. 

How to solve it?

Cause analysis: 

Check that the motor parameters are correct. Check that there are no mechanical faults in the motor and load. Measure the voltage balance of the three-phase output of theVFD and confirm that there are no hardware issues. 

Solution: 

Comprehensive static autotuning of motor parameters. Optimize P00.00 speed control mode and change to SVC0 operation. Improvement effect: Eliminating motor noise and vibration.